Recent content by Orson1981

  1. O

    Looking for a low temp actuator or motor

    Thanks everyone for the suggestions! My natural insticnt is to always want to build everything from scratch, even after the guy with the letters "d" "r" in front of his name tells me not to... Though here I would have to agree, going through a supplier seems like the best idea. I'll keep...
  2. O

    Looking for a low temp actuator or motor

    I just thought I would throw this out there, see if anyone knows of some good products or neat tricks. We are building a probe to be used with some DC SQUIDs that are going to be operating at low temp (~4 - 40K). For part of the design we want some sort of actuator or motor that would allow...
  3. O

    Mathematica Plotting Logistics Equation with Mathematica

    Thanks everyone for your input, To David: I tried DPlot over the weekend and could manage to make it give me anything, I'll re-read your second post and try again this evening. I really could use a program that can do things like this easily, so I'm hoping it works out. To CompuChip and...
  4. O

    Mathematica Plotting Logistics Equation with Mathematica

    I'm going through "The Chaos Cookbook" right now, a fairly old book on chaos programming. A bit too old I'm afraid, all the programs are written in Pascal and Basic. I had been using Excel (well, Open Office Calc) to do the iterations and graphing, but I feel that the size of the programs are...
  5. O

    Understanding mechanical concepts

    Codec9, your right I did not put any further explanation of energy in my previous post. My aim with that post was to phrase the question in a way that it could be intuitively understood without any background in mathematics, as I feel is the intention of this thread. In my experience...
  6. O

    Understanding mechanical concepts

    No, I told you why: It takes more Energy to overcome an increase in inertia (mass). As to why that is: it is because inertia opposes any change in direction: Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it. Or nothing...
  7. O

    Understanding mechanical concepts

    While you could look at it that way, it is not the way I would view the problem, I think a better understand would come from interperting the energy of the train. In order to overcome inertia (mass) it would take twice as much kinetic energy for the two box train (or twice width train) to reach...
  8. O

    Understanding mechanical concepts

    I'm going to second the explination of Claude Bile, that was really well written. Only to add, Skhandelwal, trust me, it takes awhile, but the longer you keep with physics, the clearer these ideas become. Understanding Physics is an evolving practice, if you look at these questions two...
  9. O

    Why can't I get Stoke's Theorem to Work ?

    Thank you!, armed with your hint I went back and 'carefully' looked at one of my undergrad math books I'm using as a reference, and of course there it was staring me in the face the whole time, but until you came along I was just to dense to see it. and thank you for not giving me the...
  10. O

    Why can't I get Stoke's Theorem to Work ?

    Why can't I get Stoke's Theorem to Work!? Homework Statement This is very similar to the problem I put up last night actually part c of the same problem. I really have put an amazing amount of time into this problem (week and a half/ 5 hrs a day) and it countinues to stump me. At this point...
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    Evaluating Line Integral for xy Plane Semi-Circle

    Thanks for the info, I'm going to have to look at this again. dynamicsolo, your absolutely correct in that when you look at Stoke's Theorem it pops out right away that the answer is zero. As for looking at the semi-circle part of the integral, I worked on it for a couple of hours today, and I...
  12. O

    Evaluating Line Integral for xy Plane Semi-Circle

    Homework Statement This comes from Mathematical Methods for the Physicist from Susan Lea, Chapter 1 Question 25 Part B (Incase anyone is familar with the book). The question asks to evaluate the line integral integral (u*dl) where the vector u is: u = x*y^2 i + y*x^2 j along the...
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